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Dependencies:   mbed Blynk

u8glibARM/u8g_com_std_sw_spi.c@0:d8f4c441e032, 2016-06-10 (annotated)

Committer:
lixianyu
Date:
Fri Jun 10 15:20:20 2016 +0000
Revision:
0:d8f4c441e032
u8glib???????????i2c???

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lixianyu 0:d8f4c441e032 1 /*
lixianyu 0:d8f4c441e032 2
lixianyu 0:d8f4c441e032 3 u8g_com_std_sw_spi.c
lixianyu 0:d8f4c441e032 4
lixianyu 0:d8f4c441e032 5 Universal 8bit Graphics Library
lixianyu 0:d8f4c441e032 6
lixianyu 0:d8f4c441e032 7 Copyright (c) 2015, olikraus@gmail.com
lixianyu 0:d8f4c441e032 8 All rights reserved.
lixianyu 0:d8f4c441e032 9
lixianyu 0:d8f4c441e032 10 Redistribution and use in source and binary forms, with or without modification,
lixianyu 0:d8f4c441e032 11 are permitted provided that the following conditions are met:
lixianyu 0:d8f4c441e032 12
lixianyu 0:d8f4c441e032 13 * Redistributions of source code must retain the above copyright notice, this list
lixianyu 0:d8f4c441e032 14 of conditions and the following disclaimer.
lixianyu 0:d8f4c441e032 15
lixianyu 0:d8f4c441e032 16 * Redistributions in binary form must reproduce the above copyright notice, this
lixianyu 0:d8f4c441e032 17 list of conditions and the following disclaimer in the documentation and/or other
lixianyu 0:d8f4c441e032 18 materials provided with the distribution.
lixianyu 0:d8f4c441e032 19
lixianyu 0:d8f4c441e032 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
lixianyu 0:d8f4c441e032 21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
lixianyu 0:d8f4c441e032 22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
lixianyu 0:d8f4c441e032 23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lixianyu 0:d8f4c441e032 24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
lixianyu 0:d8f4c441e032 25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
lixianyu 0:d8f4c441e032 26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
lixianyu 0:d8f4c441e032 27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
lixianyu 0:d8f4c441e032 28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lixianyu 0:d8f4c441e032 29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
lixianyu 0:d8f4c441e032 30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
lixianyu 0:d8f4c441e032 31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
lixianyu 0:d8f4c441e032 32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lixianyu 0:d8f4c441e032 33
lixianyu 0:d8f4c441e032 34 */
lixianyu 0:d8f4c441e032 35
lixianyu 0:d8f4c441e032 36 #include "u8g.h"
lixianyu 0:d8f4c441e032 37
lixianyu 0:d8f4c441e032 38 #if defined(U8G_WITH_PINLIST)
lixianyu 0:d8f4c441e032 39
lixianyu 0:d8f4c441e032 40 static void u8g_sw_spi_shift_out(uint8_t dataPin, uint8_t clockPin, uint8_t val)
lixianyu 0:d8f4c441e032 41 {
lixianyu 0:d8f4c441e032 42 uint8_t i = 8;
lixianyu 0:d8f4c441e032 43 do
lixianyu 0:d8f4c441e032 44 {
lixianyu 0:d8f4c441e032 45 if ( val & 128 )
lixianyu 0:d8f4c441e032 46 u8g_SetPinLevel(dataPin, 1);
lixianyu 0:d8f4c441e032 47 else
lixianyu 0:d8f4c441e032 48 u8g_SetPinLevel(dataPin, 0);
lixianyu 0:d8f4c441e032 49 val <<= 1;
lixianyu 0:d8f4c441e032 50 u8g_MicroDelay(); /* 23 Sep 2012 */
lixianyu 0:d8f4c441e032 51 //delay(1);
lixianyu 0:d8f4c441e032 52 u8g_SetPinLevel(clockPin, 1);
lixianyu 0:d8f4c441e032 53 u8g_MicroDelay(); /* 23 Sep 2012 */
lixianyu 0:d8f4c441e032 54 //delay(1);
lixianyu 0:d8f4c441e032 55 u8g_SetPinLevel(clockPin, 0);
lixianyu 0:d8f4c441e032 56 u8g_MicroDelay(); /* 23 Sep 2012 */
lixianyu 0:d8f4c441e032 57 //delay(1);
lixianyu 0:d8f4c441e032 58 i--;
lixianyu 0:d8f4c441e032 59 } while( i != 0 );
lixianyu 0:d8f4c441e032 60 }
lixianyu 0:d8f4c441e032 61
lixianyu 0:d8f4c441e032 62 uint8_t u8g_com_std_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
lixianyu 0:d8f4c441e032 63 {
lixianyu 0:d8f4c441e032 64 switch(msg)
lixianyu 0:d8f4c441e032 65 {
lixianyu 0:d8f4c441e032 66 case U8G_COM_MSG_INIT:
lixianyu 0:d8f4c441e032 67 u8g_SetPIOutput(u8g, U8G_PI_SCK);
lixianyu 0:d8f4c441e032 68 u8g_SetPIOutput(u8g, U8G_PI_MOSI);
lixianyu 0:d8f4c441e032 69 u8g_SetPIOutput(u8g, U8G_PI_RESET);
lixianyu 0:d8f4c441e032 70 u8g_SetPIOutput(u8g, U8G_PI_CS);
lixianyu 0:d8f4c441e032 71 u8g_SetPIOutput(u8g, U8G_PI_A0);
lixianyu 0:d8f4c441e032 72 u8g_SetPILevel(u8g, U8G_PI_SCK, 0);
lixianyu 0:d8f4c441e032 73 u8g_SetPILevel(u8g, U8G_PI_MOSI, 0);
lixianyu 0:d8f4c441e032 74 break;
lixianyu 0:d8f4c441e032 75
lixianyu 0:d8f4c441e032 76 case U8G_COM_MSG_STOP:
lixianyu 0:d8f4c441e032 77 break;
lixianyu 0:d8f4c441e032 78
lixianyu 0:d8f4c441e032 79 case U8G_COM_MSG_RESET:
lixianyu 0:d8f4c441e032 80 u8g_SetPILevel(u8g, U8G_PI_RESET, arg_val);
lixianyu 0:d8f4c441e032 81 break;
lixianyu 0:d8f4c441e032 82
lixianyu 0:d8f4c441e032 83 case U8G_COM_MSG_CHIP_SELECT:
lixianyu 0:d8f4c441e032 84 if ( arg_val == 0 )
lixianyu 0:d8f4c441e032 85 {
lixianyu 0:d8f4c441e032 86 /* disable */
lixianyu 0:d8f4c441e032 87 u8g_SetPILevel(u8g, U8G_PI_CS, 1);
lixianyu 0:d8f4c441e032 88 }
lixianyu 0:d8f4c441e032 89 else
lixianyu 0:d8f4c441e032 90 {
lixianyu 0:d8f4c441e032 91 /* enable */
lixianyu 0:d8f4c441e032 92 u8g_SetPILevel(u8g, U8G_PI_SCK, 0);
lixianyu 0:d8f4c441e032 93 u8g_SetPILevel(u8g, U8G_PI_CS, 0);
lixianyu 0:d8f4c441e032 94 }
lixianyu 0:d8f4c441e032 95 break;
lixianyu 0:d8f4c441e032 96
lixianyu 0:d8f4c441e032 97 case U8G_COM_MSG_WRITE_BYTE:
lixianyu 0:d8f4c441e032 98 u8g_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
lixianyu 0:d8f4c441e032 99 break;
lixianyu 0:d8f4c441e032 100
lixianyu 0:d8f4c441e032 101 case U8G_COM_MSG_WRITE_SEQ:
lixianyu 0:d8f4c441e032 102 {
lixianyu 0:d8f4c441e032 103 register uint8_t *ptr = arg_ptr;
lixianyu 0:d8f4c441e032 104 while( arg_val > 0 )
lixianyu 0:d8f4c441e032 105 {
lixianyu 0:d8f4c441e032 106 u8g_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], *ptr++);
lixianyu 0:d8f4c441e032 107 arg_val--;
lixianyu 0:d8f4c441e032 108 }
lixianyu 0:d8f4c441e032 109 }
lixianyu 0:d8f4c441e032 110 break;
lixianyu 0:d8f4c441e032 111
lixianyu 0:d8f4c441e032 112 case U8G_COM_MSG_WRITE_SEQ_P:
lixianyu 0:d8f4c441e032 113 {
lixianyu 0:d8f4c441e032 114 register uint8_t *ptr = arg_ptr;
lixianyu 0:d8f4c441e032 115 while( arg_val > 0 )
lixianyu 0:d8f4c441e032 116 {
lixianyu 0:d8f4c441e032 117 u8g_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], u8g_pgm_read(ptr));
lixianyu 0:d8f4c441e032 118 ptr++;
lixianyu 0:d8f4c441e032 119 arg_val--;
lixianyu 0:d8f4c441e032 120 }
lixianyu 0:d8f4c441e032 121 }
lixianyu 0:d8f4c441e032 122 break;
lixianyu 0:d8f4c441e032 123
lixianyu 0:d8f4c441e032 124 case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
lixianyu 0:d8f4c441e032 125 u8g_SetPILevel(u8g, U8G_PI_A0, arg_val);
lixianyu 0:d8f4c441e032 126 break;
lixianyu 0:d8f4c441e032 127 }
lixianyu 0:d8f4c441e032 128 return 1;
lixianyu 0:d8f4c441e032 129 }
lixianyu 0:d8f4c441e032 130
lixianyu 0:d8f4c441e032 131 #else
lixianyu 0:d8f4c441e032 132
lixianyu 0:d8f4c441e032 133
lixianyu 0:d8f4c441e032 134 uint8_t u8g_com_std_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
lixianyu 0:d8f4c441e032 135 {
lixianyu 0:d8f4c441e032 136 return 1;
lixianyu 0:d8f4c441e032 137 }
lixianyu 0:d8f4c441e032 138
lixianyu 0:d8f4c441e032 139
lixianyu 0:d8f4c441e032 140 #endif
lixianyu 0:d8f4c441e032 141